BQ34210-Q1 Datasheet, PDF (8/19 Pages) Texas Instruments – Automotive 1-Series Cell System-Side CEDV Fuel Gauge for Rarely Discharged Batteries

bq34210-Q1
SLUSCG1 – AUGUST 2017
7 Detailed Description
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7.1 Overview
The bq34210-Q1 incorporates fuel gauging and an End-of-Service (EOS) Determination function for use in 1-
series cell packs with support for multiple battery chemistries, including Lithium-Ion (Li-Ion), Lithium Iron
Phosphate (LiFePO4), and Nickel Metal Hydride (NiMH). The gas gauging function uses Compensated End-of-
Discharge Voltage (CEDV) technology to accurately predict the battery capacity and other operational
characteristics of the battery, and can be interrogated by a host processor to provide cell information, such as
remaining capacity, full charge capacity, and average current.
See the bq34210-Q1 Technical Reference Manual (TRM, SLUUBE8) for further details.
NOTE
The following formatting conventions are used in this document:
Commands: italics with parentheses() and no breaking spaces, for example, Control().
Data Flash: italics, bold, and breaking spaces, for example, Design Capacity.
Register bits and flags: italics with brackets [ ], for example, [TDA]
Data flash bits: italics, bold, and brackets [ ], for example, [LED1]
Modes and states: ALL CAPITALS, for example, UNSEALED mode.
7.2 Functional Block Diagram
SDA
SCL
ALERT
CPU
Instruction
ROM
Data ROM
Factory
Data OTP
SRAM
1.8-V LDO
Coulomb
Counter
REGIN
REG18
SRP
Sleep
Comparator
SRN
TS
Temperature
ADC
Internal
Temperature
Sensor
VSS
Copyright © 2017, Texas Instruments Incorporated
7.3 Feature Description
Information is accessed through a series of commands called Standard Commands. The Extended Commands
set provides additional capabilities. Both sets of commands, indicated by the general format Command(), are
used to read and write information in the control and status registers, as well as its data locations. Commands
are sent from the system to the gauge via the I²C serial communications engine, and can be executed during
application development, system manufacture, or end-equipment operation.
8
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